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Purification of Quartz Material by Byproduct Fluorosilicic Acid and Process for Preparation of Aluminum Fluoride and High Purity White Carbon Black

A technology of fluorosilicic acid and aluminum fluoride, which is used in the deep processing of non-metallic minerals and environmental protection, can solve the problems of unsatisfactory shear force and dispersion effect, low purity of silica products and small specific surface area, etc. The effect of fine particle size, high oil absorption value and large specific surface area

Active Publication Date: 2022-06-14
HUANGGANG NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this treatment method has certain social benefits, on the one hand, the reaction needs to add solid aluminum hydroxide powder in the high-temperature liquid phase; on the other hand, the shearing force and dispersion effect of conventional reactor stirring cannot meet the expected requirements. , the SiO generated by the reaction 2 ·nH 2 O particles are coarse, and the final white carbon black product has low purity, small specific surface area, low oil absorption value, and many impurities, which are difficult to be accepted by the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Taking the mass percentage concentration produced by a phosphate fertilizer company in Hubei Province as 18% fluorosilicic acid (containing HF as 4%) and the 24-120 mesh quartz sand produced by a quartz sand company in Heyuan City, Guangdong Province as examples to illustrate the invention. process.

[0031] 1. Quartz pickling and acid purification:

[0032] Put the quartz sand powder into the quartz material pickling and purification device (refer to the device described in Patent No. 201110121881.9, Authorization Announcement No.: CN102259870B), and then pump it into the heated fluorine-containing acid solution, and the acid solution is removed from the pickling solution. The bottom of the tank enters, and then flows out from the top. After the fine sand is precipitated in the grit chamber, it enters the acid pump. In this way, the acid solution is heated in a cycle until the temperature in the pickling tank reaches 90 °C, and then the acid solution is kept for 4 hour...

Embodiment 2

[0040] Taking the mass percentage concentration produced by a phosphate fertilizer company in Jiangxi Province as 17% fluorosilicic acid (the other containing HF is 3%) and the 30-140 mesh quartz sand produced by a quartz sand company in Ganzhou City, Jiangxi Province as examples to illustrate the invention. process.

[0041] 1. Quartz pickling and acid purification:

[0042]Put the quartz sand powder into the quartz material pickling and purification device, and then pump it into the heated fluorine-containing acid solution. The acid solution enters from the bottom of the pickling tank, then flows out from the top, and settles the fine sand through the grit chamber. After that, it enters the acid pump, and the acid solution is heated in this way until the temperature in the pickling tank reaches 92 °C, and then the acid solution is kept for 3 hours, and the acid solution is removed to the acid storage tank. Impurities such as: feldspar, kaolinite, illite, pyrophyllite and ot...

Embodiment 3

[0050] The process of the present invention is illustrated by taking the mass percentage concentration of 18% fluorosilicic acid produced by a phosphate fertilizer company in Hubei Province and 30-140 mesh quartz sand produced by a quartz sand company in Huanggang City, Hubei Province as examples.

[0051] 1. Quartz pickling and acid purification:

[0052] Put the quartz sand powder into the quartz material pickling and purification device, and then pump it into the heated fluorine-containing acid solution. The acid solution enters from the bottom of the pickling tank, then flows out from the top, and settles the fine sand through the grit chamber. After that, enter the acid pump, and heat the acid solution in this way until the temperature in the pickling tank reaches 85 °C, then keep the acid solution for 4 hours, remove the acid solution to the acid storage tank, and cool it to room temperature. Impurities such as: feldspar, kaolinite and other silicate minerals are decompo...

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Abstract

The invention relates to a process for purifying quartz materials and preparing aluminum fluoride and high-purity white carbon black by using by-product fluosilicic acid. After pickling and removing impurities, high-purity quartz products are obtained. During this process, HF and SiO 2 Reaction to SiF 4 and hydrolyzed to H 2 SiF 6 ; then put H 2 SiF 6 After purification, react with aluminum hydroxide to obtain high-purity white carbon black products and high-purity aluminum fluoride products. In this way, the scientific and rational utilization of the by-product fluosilicic acid solution and the maximum benefit are realized, and its economic benefit and social benefit are remarkable.

Description

technical field [0001] The invention relates to a process method for purifying quartz material and preparing high-purity aluminum fluoride and high-purity white carbon black by utilizing by-product fluorosilicic acid fluoride, and belongs to the technical field of non-metallic ore deep processing and environmental protection. Background technique [0002] my country's phosphate fertilizer industry produces a large amount of by-product fluorosilicic acid every year. These fluorosilicic acid solutions usually contain many impurities, including hydrofluoric acid, which are mostly used as raw materials for the preparation of aluminum fluoride. The reaction formula is as follows: H 2 SiF 6 +2Al(OH) 3 +(n+2H 2 O)=2(AlF 3 ·3H 2 O)+SiO 2 ·nH 2 O. Although this treatment method has certain social benefits, on the one hand, the reaction needs to add solid aluminum hydroxide powder to the high temperature liquid phase. , the SiO generated by the reaction 2 ·nH 2 O particles a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/50C01B33/18
CPCC01F7/50C01B33/186C01P2006/80
Inventor 田辉明田正芳黄林勇江军民
Owner HUANGGANG NORMAL UNIV
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